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/*
* equalizer.cc
* Copyright 2014 William Pitcock
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions, and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions, and the following disclaimer in the documentation
* provided with the distribution.
*
* This software is provided "as is" and without any warranty, express or
* implied. In no event shall the authors be liable for any damages arising from
* the use of this software.
*/
#include <QCheckBox>
#include <QDialog>
#include <QFrame>
#include <QHBoxLayout>
#include <QLabel>
#include <QPainter>
#include <QSlider>
#include <QStyle>
#include <QVBoxLayout>
#include <libaudcore/equalizer.h>
#include <libaudcore/hook.h>
#include <libaudcore/i18n.h>
#include <libaudcore/runtime.h>
#include "libaudqt.h"
class VLabel : public QLabel
{
public:
VLabel (const QString & text, QWidget * parent = nullptr) :
QLabel (text, parent) {}
QSize minimumSizeHint () const
{
QSize s = QLabel::minimumSizeHint ();
return QSize (s.height (), s.width ());
}
QSize sizeHint () const
{
QSize s = QLabel::sizeHint ();
return QSize (s.height (), s.width ());
}
void paintEvent (QPaintEvent *)
{
QPainter p (this);
p.rotate (270);
QRect box (-height (), 0, height (), width ());
style ()->drawItemText (& p, box, (int) alignment (), palette (),
isEnabled (), text (), QPalette::Foreground);
}
};
class EqualizerSlider : public QWidget
{
public:
QSlider slider;
EqualizerSlider (const char * label, QWidget * parent) :
QWidget (parent),
slider (Qt::Vertical)
{
slider.setMinimumHeight (audqt::sizes.OneInch);
slider.setRange (-AUD_EQ_MAX_GAIN, AUD_EQ_MAX_GAIN);
slider.setTickInterval (AUD_EQ_MAX_GAIN >> 1);
slider.setTickPosition (QSlider::TicksBothSides);
auto layout = audqt::make_vbox (this);
auto value_label = new QLabel ("0");
layout->addWidget (new VLabel (label, this), 1, Qt::AlignCenter);
layout->addWidget (& slider, 0, Qt::AlignCenter);
layout->addWidget (value_label, 0, Qt::AlignCenter);
connect (& slider, & QSlider::valueChanged, [value_label] (int value) {
value_label->setText (QString::number (value));
});
}
};
class EqualizerWindow : public QDialog
{
public:
EqualizerWindow ();
private:
QCheckBox m_onoff_checkbox;
EqualizerSlider * m_preamp_slider;
EqualizerSlider * m_sliders[AUD_EQ_NBANDS];
void updateActive ();
void updatePreamp ();
void updateBands ();
const HookReceiver<EqualizerWindow>
hook1 {"set equalizer_active", this, & EqualizerWindow::updateActive},
hook2 {"set equalizer_preamp", this, & EqualizerWindow::updatePreamp},
hook3 {"set equalizer_bands", this, & EqualizerWindow::updateBands};
};
EqualizerWindow::EqualizerWindow () :
m_onoff_checkbox (audqt::translate_str (N_("_Enable")))
{
const char * const names[AUD_EQ_NBANDS] = {N_("31 Hz"), N_("63 Hz"),
N_("125 Hz"), N_("250 Hz"), N_("500 Hz"), N_("1 kHz"), N_("2 kHz"),
N_("4 kHz"), N_("8 kHz"), N_("16 kHz")};
auto slider_container = new QWidget (this);
auto slider_layout = audqt::make_hbox (slider_container, audqt::sizes.TwoPt);
m_preamp_slider = new EqualizerSlider (_("Preamp"), this);
slider_layout->addWidget (m_preamp_slider);
auto line = new QFrame (this);
line->setFrameShape (QFrame::VLine);
line->setFrameShadow (QFrame::Sunken);
slider_layout->addWidget (line);
for (int i = 0; i < AUD_EQ_NBANDS; i ++)
{
m_sliders[i] = new EqualizerSlider (_(names[i]), this);
slider_layout->addWidget (m_sliders[i]);
}
auto layout = audqt::make_vbox (this);
layout->setSizeConstraint (QLayout::SetFixedSize);
layout->addWidget (& m_onoff_checkbox);
layout->addWidget (slider_container);
setWindowTitle (_("Equalizer"));
setContentsMargins (audqt::margins.EightPt);
m_onoff_checkbox.setFocus ();
updateActive ();
updatePreamp ();
updateBands ();
connect (& m_onoff_checkbox, & QCheckBox::stateChanged, [] (int state) {
aud_set_bool (nullptr, "equalizer_active", (state == Qt::Checked));
});
connect (& m_preamp_slider->slider, & QSlider::valueChanged, [] (int value) {
aud_set_int (nullptr, "equalizer_preamp", value);
});
for (int i = 0; i < AUD_EQ_NBANDS; i ++)
{
connect (& m_sliders[i]->slider, & QSlider::valueChanged, [i] (int value) {
aud_eq_set_band (i, value);
});
}
}
void EqualizerWindow::updateActive ()
{
bool active = aud_get_bool (nullptr, "equalizer_active");
m_onoff_checkbox.setCheckState (active ? Qt::Checked : Qt::Unchecked);
}
void EqualizerWindow::updatePreamp ()
{
m_preamp_slider->slider.setValue (aud_get_int (nullptr, "equalizer_preamp"));
}
void EqualizerWindow::updateBands ()
{
double values[AUD_EQ_NBANDS];
aud_eq_get_bands (values);
for (int i = 0; i < AUD_EQ_NBANDS; i ++)
m_sliders[i]->slider.setValue (values[i]);
}
static EqualizerWindow * s_equalizer = nullptr;
namespace audqt {
EXPORT void equalizer_show ()
{
if (! s_equalizer)
{
s_equalizer = new EqualizerWindow;
s_equalizer->setAttribute (Qt::WA_DeleteOnClose);
QObject::connect (s_equalizer, & QObject::destroyed, [] () {
s_equalizer = nullptr;
});
}
window_bring_to_front (s_equalizer);
}
EXPORT void equalizer_hide ()
{
delete s_equalizer;
}
} // namespace audqt
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